CN102086992A - Backlight module and application thereof - Google Patents
Backlight module and application thereof Download PDFInfo
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- CN102086992A CN102086992A CN2009102531659A CN200910253165A CN102086992A CN 102086992 A CN102086992 A CN 102086992A CN 2009102531659 A CN2009102531659 A CN 2009102531659A CN 200910253165 A CN200910253165 A CN 200910253165A CN 102086992 A CN102086992 A CN 102086992A
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Abstract
The invention relates to a backlight module and application thereof. The backlight module at least comprises a light guide plate, a light emitting diode (LED) light source module and a reflector, wherein the light guide plate is provided with an incident surface; the LED light source module is arranged beside the incident surface; the reflector is provided with an opening which is adjacent to the incident surface; the LED light source module is arranged in the reflector and emits incident light towards the incident surface through the opening; and the height of the opening is less than the thickness of the light guide plate. The backlight module can effectively relieve a bright spot phenomenon.
Description
Technical field
The present invention relates to a kind of backlight module, and particularly relate to a kind of backlight module and application on LCD (LCD) thereof that can effectively alleviate bright spot (Hot Spot) phenomenon.
Background technology
Please refer to Figure 1A, it illustrates the cut-away section schematic diagram of traditional backlight module.Backlight module 100 mainly comprises LGP 102, LED light-source module 106 and reflector 116, wherein LED light-source module 106 is arranged on by the side of LGP 102, and 116 of reflectors are around in the outside of LED light-source module 106 and surround LED light-source module 106 jointly with LGP 102.Reflector 116 is made up of three side plates 118,120 and 122, and its latus inframedium 118 and 120 is bonded on the opposite end of side plate 122 respectively, and side plate 118 and 120 toward each other.LED light-source module 106 mainly comprises circuit board 110 and several light emitting diodes 108, and wherein these light emitting diodes 108 are arranged on the surface of circuit board 110.In LED light-source module 106, each light emitting diode 108 all has exiting surface 112.The side that LGP 102 is adjacent to LED light-source module 106 has incidence surface 104.
In backlight module 100, LED light-source module 106 is arranged in the side plate 118,120 and 122 spaces that constituted of reflector 116, and circuit board 110 is sticked on the side plate 118 of reflector 116.102 of LGPs are arranged on the circuit board 110 of LED light-source module 106, wherein the incidence surface 104 of LGP 102 is faced mutually with the exiting surface 112 of all light emitting diodes 108, and the exiting surface 112 of light emitting diode 108 and the incidence surface 104 of LGP 102 near, shown in Figure 1A.
Yet, please refer to shown in Figure 1B, because light emitting diode 108 is a spot light, therefore in backlight module 100, brighter near light emitting diode 108 parts, and the zone between two light emitting diodes 108 is darker, such phenomenon is commonly referred to as bright spot ripple (Hot Spot Mura) 114.Bright spot ripple 114 can influence the uniformity of the light source that backlight module 100 provided, and then can reduce display quality.
At the bright spot phenomenon, common settling mode is to adopt photomask or glue frame to cover the zone of brightness irregularities at present.But such mode can increase the width of visible area to the edge frontal region between the backlight module edge, and is unfavorable for the miniaturization design of present backlight module.
The another kind of mode that solves the bright spot phenomenon is the spacing (Pitch) by the light emitting diode of reduction LED light-source module, improves the bright spot ripple to see through the density that is provided with that increases light emitting diode.Yet the mode of the spacing of reduction light emitting diode can cause the cost of backlight module to improve, and is not good settling mode.
Summary of the invention
Therefore, an aspect of of the present present invention is providing a kind of backlight module exactly, it can limit the rising angle of two directions up and down of light emitting diode, the angle that the light of controlling light emitting diode thus and being sent enters LGP, and the central authorities that make the more past visible area of light penetrate from the exiting surface of LGP after advancing again, so can effectively alleviate even eliminate the bright spot ripple of the light inlet of LGP.
Another aspect of the present invention is that a kind of backlight module is being provided, its bright spot phenomenon can obtain significantly to improve or eliminate, therefore can increase the spacing of the light emitting diode of LED light-source module, and can reduce the usage quantity of light emitting diode, and can reduce the edge frontal region of backlight module.
Another aspect of the present invention is that a kind of LCD is being provided, and it can taken into account under the dimensions of display, reduces or eliminate the bright spot ripple of backlight module, therefore can effectively promote the display quality of LCD under original dimensions.
According to above-mentioned purpose of the present invention, a kind of backlight module is proposed, comprise at least: LGP has incidence surface; LED light-source module is located at by the incidence surface; And reflector, have opening and be adjacent to incidence surface, wherein LED light-source module be arranged in the reflector and via opening towards the incidence surface incident light, the height of opening is less than the thickness of LGP.
According to purpose of the present invention, a kind of LCD is proposed, the backlight module that comprises display panels at least and be located at the back side of display panels.Wherein, this backlight module comprises at least: LGP has incidence surface; LED light-source module is located at by the incidence surface; And reflector, have opening and be adjacent to incidence surface, wherein LED light-source module be arranged in the reflector and via opening towards the incidence surface incident light, the height of opening is less than the thickness of LGP.
Description of drawings
Figure 1A illustrates the cut-away section schematic diagram of traditional backlight module.
Figure 1B illustrates the schematic top plan view of traditional backlight module.
Fig. 2 A illustrates the cut-away section schematic diagram according to a kind of backlight module of first preferred embodiment of the present invention.
Fig. 2 B illustrates the cut-away section schematic diagram according to a kind of backlight module of second preferred embodiment of the present invention.
Fig. 2 C illustrates the cut-away section schematic diagram according to a kind of backlight module of the 3rd preferred embodiment of the present invention.
Fig. 2 D illustrates the cut-away section schematic diagram according to a kind of backlight module of the 4th preferred embodiment of the present invention.
The distance that Fig. 3 A illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness of LGP is 4mm, and the opening of reflector is under the situation of 4mm, the brightness distribution curve figure that is obtained.
The distance that Fig. 3 B illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness of LGP is 4mm, and the opening of reflector is under the situation of 3.8mm, the brightness distribution curve figure that is obtained.
The distance that Fig. 3 C illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness of LGP is 4mm, and the opening of reflector is under the situation of 3.6mm, the brightness distribution curve figure that is obtained.
The distance that Fig. 3 D illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness of LGP is 4mm, and the opening of reflector is under the situation of 3mm, the brightness distribution curve figure that is obtained.
The distance that Fig. 3 E illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness of LGP is 4mm, and the opening of reflector is under the situation of 2.4mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 A illustrates when LGP is 4mm, and the opening of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 B illustrates when LGP is 4mm, and the opening of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 C illustrates when LGP is 4mm, and the opening of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1.08mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 D illustrates when LGP is 4mm, and the opening of reflector is 3mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 E illustrates when LGP is 4mm, and the opening of reflector is 3mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 F illustrates when LGP is 4mm, and the opening of reflector is 2.4mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 G illustrates when LGP is 4mm, and the opening of reflector is 2.4mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.
The thickness that Fig. 4 H illustrates when LGP is 4mm, and the opening of reflector is 1.8mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP is under the situation of 0.9mm, the brightness distribution curve figure that is obtained.
Fig. 5 illustrates the cut-away section schematic diagram according to a kind of LCD of the preferred embodiment of the present invention.
Description of reference numerals
100: backlight module 102: LGP
104: incidence surface 106: LED light-source module
108: light emitting diode 110: circuit board
112: exiting surface 114: the bright spot ripple
116: reflector 118: side plate
120: side plate 122: side plate
300a: backlight module 300b: backlight module
300c: backlight module 300d: backlight module
302a: LGP 302b: LGP
304: LED light-source module
306: light emitting diode 308: circuit board
310a: reflector 310b: reflector
310c: reflector 312:C type structure
314a: extension 314b: extension
314c: extension 316: end
318: exiting surface 320: incidence surface
322a: opening 322b: opening
322c: opening 324a: highly
324b: height 324c: highly
326: thickness 327: distance
328: light 330: the lead angle district
332: non-lead angle district 334: highly
336: exiting surface 338: back of the body frame
340: fixedly projection 342: trip
344: preceding frame 346: fixing hole
348: perforate 350: figure
352: figure 354: figure
358: figure 360: figure
364: figure 366: figure
370: figure 372: figure
376: figure 378: figure
380: figure 381: figure
382: figure 384: figure
385: figure 387: figure
388: figure 390: figure
391: figure 393: figure
394: figure 396: figure
397: figure 399: figure
400: LCD 402: display panels
403: figure 404: figure
405: figure 406: figure
AA ': longitudinal axis BB ': transverse axis
The specific embodiment
Please refer to Fig. 2 A, it illustrates the cut-away section schematic diagram according to a kind of backlight module of first preferred embodiment of the present invention.In example embodiment, backlight module 300a comprises LGP 302a, LED light-source module 304 and reflector 310a at least.Wherein, the side of LGP 302a has incidence surface 320, and the opposite side adjacent with this side of LGP 302a then has exiting surface 336.LED light-source module 304 is arranged among the reflector 310a, and the combination of LED light-source module 304 and reflector 310a is arranged on incidence surface 320 sides of LGP 302a.LGP 302a has thickness 326.In an embodiment, LGP 302a can for example be wedge type plate structure or slab construction.Wherein, when LGP 302a was the slab construction of thickness essence unanimity, the thickness at incidence surface 320 places can be represented the thickness 326 of LGP 302a; And when LGP 302a was the wedge type plate structure, the thickness 326 of LGP 302a was the thickness of adopting the thick of whole LGP 302a, was the thickness at incidence surface 320 places usually.LED light-source module 304 mainly comprises circuit board 308 and several light emitting diodes 306, wherein each light emitting diode 306 all has exiting surface 318, and these light emitting diodes 306 are arranged on the surface of circuit board 308, and the exiting surface 318 of each light emitting diode 306 is relative with the incidence surface 320 of LGP 302a.
Reflector 310a comprises C type structure 312 and two extension 314a at least, and wherein C type structure 312 has perforate 348, and this two extension 314a is bonded on the two ends 316 of the perforate 348 of C type structure 312 respectively.In this example embodiment, each extension 314a is dull and stereotyped, and this two extension 314a is arranged on substantial level and the mode that is parallel to each other between the incidence surface 320 of the two ends 316 of perforate 348 of C type structure 312 and LGP 302a, and before the incidence surface 320 of LGP 302a, form opening 322a, that is the opening 322a of reflector 310a is adjacent to the incidence surface 320 of LGP 302a, so LED light-source module 304 can be via opening 322a towards incidence surface 320 incident lights of LGP 302a.The opening 322a of reflector 310a is to the fixed distance of the incidence surface 320 of LGP 302a, and wherein reflector 310a preferably contacts with the incidence surface 320 of LGP 302a.The circuit board 308 of LED light-source module 304 is installed with in the C of reflector 310a type structure 312, and the exiting surface 318 of each light emitting diode 306 is preferably between this two extension 314a.Wherein, standoff distance 327 between the incidence surface 320 of the exiting surface 318 of light emitting diode 306 and LGP 302a.Reflection and the guiding of extension 314a by reflector 310a can import the incidence surface 320 in opening 322a the place aheads via the light 328 that exiting surface 318 sent with light emitting diode 306 and enter among the LGP 302a.
In this example embodiment, the height 324a of the opening 322a of reflector 310a is less than the thickness 326 of LGP 302a, shown in Fig. 2 A.In an embodiment, when the thickness 326 of LGP 302a was about 4mm, the height 324a of the opening 322a of reflector 310a preferably can be between about 3.0mm between about 3.8mm.Therefore, the height 324a of the opening 322a of reflector 310a preferably can be between the essence 3/4 of the thickness 326 of LGP 302a between the essence 19/20.The height 324a of opening 322a by reduction reflector 310a, dwindle the spacing between the reflecting surface of two directions up and down of light emitting diode 306, thus, can limit light emitting diode 306 at the rising angle of two directions up and down, angle when the light 328 that light emitting diode 306 is sent enters LGP 302a thus is controlled at proper range, and can reduce the bright intensity of the LGP 302a that is positioned at light emitting diode 306 dead aheads, and then can effectively solve the bright spot ripple of backlight module 300a.The height 324a of the opening 322a of reflector 310a is more little, the situation of the bright spot ripple of backlight module 300a is just slight more, and the distance 327 between the exiting surface 318 of light emitting diode 306 and the incidence surface 320 of LGP 302a can be short more, but the bright line situation of LGP 302a can be more obvious.In example embodiment, the ratio between the height 324a of distance 327 between the exiting surface 318 of light emitting diode 306 and the incidence surface 320 of LGP 302a and the opening 322a of reflector 310a is preferably greater than or equals 30%.
The reflector of backlight module of the present invention can have other different designs.Please refer to Fig. 2 B, it illustrates the cut-away section schematic diagram according to a kind of backlight module of second preferred embodiment of the present invention.In this example embodiment, backlight module 300a with first embodiment is identical haply in the device design of backlight module 300b, and the difference between the two only is that the reflector 310b of backlight module 300b is different with the structural design of the reflector 310a of backlight module 300a.In backlight module 300b, reflector 310b mainly comprises C type structure 312 and two extension 314b, and wherein this two extension 314b is bonded on the two ends 316 of the perforate 348 of C type structure 312 equally respectively, and each extension 314b is dull and stereotyped.In this example embodiment, direction towards the incidence surface 320 of LGP 302a is arranged on toward the mode of outer incline between the incidence surface 320 of the two ends 316 of perforate 348 of C type structure 312 and LGP 302a this two extension 314b from the two ends 316 of the perforate 348 of C type structure 312 respectively, and form opening 322b before the incidence surface 320 of LGP 302a, so LED light-source module 304 can be via the opening 322b of reflector 310b towards incidence surface 320 incident lights of LGP 302a.The opening 322b of reflector 310b is to the fixed distance of the incidence surface 320 of LGP 302a, and wherein reflector 310b preferably contacts with the incidence surface 320 of LGP 302a.In another kind of embodiment, two extensions of reflector can also be respectively the direction towards the incidence surface 320 of LGP 302a is arranged on toward the mode of interior inclination between the incidence surface 320 of the two ends 316 of perforate of C type structure and LGP 302a from the two ends of the perforate of the C of reflector type structure.Similarly, the circuit board 308 of LED light-source module 304 is installed with in the C of reflector 310b type structure 312, and the exiting surface 318 of each light emitting diode 306 is preferably between this two extension 314b.
In this example embodiment, the height 324b of the opening 322b of reflector 310b is less than the thickness 326 of LGP 302a, shown in Fig. 2 B.In an embodiment, the height 324b of the opening 322b of reflector 310b preferably can be between the essence 3/4 of the thickness 326 of LGP 302a between the essence 19/20.In example embodiment, the ratio between the height 324b of distance 327 between the exiting surface 318 of light emitting diode 306 and the incidence surface 320 of LGP 302a and the opening 322b of reflector 310b is preferably greater than or equals 30%.
Please refer to Fig. 2 C, it illustrates the cut-away section schematic diagram according to a kind of backlight module of the 3rd preferred embodiment of the present invention.In this example embodiment, backlight module 300a with first embodiment is identical haply in the device design of backlight module 300c, and the difference between the two is that equally the reflector 310c of backlight module 300c is different with the structural design of the reflector 310a of backlight module 300a.In backlight module 300c, reflector 310c mainly comprises C type structure 312 and two extension 314c, and wherein this two extension 314c is bonded on the two ends 316 of the perforate 348 of C type structure 312 equally respectively, but each extension 314c and non-tablet and be the camber plate.In this example embodiment, this two extension 314b is arranged between the incidence surface 320 of the two ends 316 of perforate 348 of C type structure 312 and LGP 302a from the two ends 316 of the perforate 348 of C type structure 312 respectively, and form opening 322c before the incidence surface 320 of LGP 302a, so LED light-source module 304 can be via the opening 322c of reflector 310c towards incidence surface 320 incident lights of LGP 302a.The opening 322c of reflector 310c is to the fixed distance of the incidence surface 320 of LGP 302a, and wherein reflector 310c preferably contacts with the incidence surface 320 of LGP 302a.Similarly, the circuit board 308 of LED light-source module 304 is installed with in the C of reflector 310c type structure 312, and the exiting surface 318 of each light emitting diode 306 is preferably between this two extension 314c.
In this example embodiment, the height 324c of the opening 322c of reflector 310c is less than the thickness 326 of LGP 302a, shown in Fig. 2 C.In an embodiment, the height 324c of the opening 322c of reflector 310c preferably can be between the essence 3/4 of the thickness 326 of LGP 302a between the essence 19/20.In example embodiment, the ratio between the height 324c of distance 327 between the exiting surface 318 of light emitting diode 306 and the incidence surface 320 of LGP 302a and the opening 322c of reflector 310c is preferably greater than or equals 30%.
Please refer to Fig. 2 D, it illustrates the cut-away section schematic diagram according to a kind of backlight module of the 4th preferred embodiment of the present invention.In this example embodiment, the backlight module 300d with first embodiment is identical haply for the design of the device of backlight module 300d, and the difference between the two is that LGP 302b is different with the structural design of 302a.In backlight module 300d, LGP 302b is made up of lead angle district 330 that engages one another and non-lead angle district 332, wherein lead angle district 330 is adjacent to LED light-source module 304 and reflector 310a, and the incidence surface 320 of LGP 302b is positioned on the side of lead angle district 330 and opening 322a adjacency.In this example embodiment, non-lead angle district 332 can be slab construction or wedge type plate structure.Therefore, the thickness 326 of LGP 302b is for being positioned at the thickness at 332 places, non-lead angle district.
In this example embodiment, the height 324a of the opening 322a of reflector 310a is less than or equal to the height 334 of incidence surface 320 of the opening 322a that is adjacent to reflector 310a in the lead angle district 330 of LGP 302b, shown in Fig. 2 D.In an embodiment, the height 324a of the opening 322a of reflector 310a is less than the thickness 326 of LGP 302b.In a preferred embodiment, the height 324a of the opening 322a of reflector 310a preferably between the essence 3/4 of the thickness 326 of LGP 302b between the essence 19/20.The opening 322a of reflector 310a is to the fixed distance of the incidence surface 320 of LGP 302b, and wherein reflector 310a preferably contacts with the incidence surface 320 in lead angle district 330.
Though in the backlight module 300d of the 4th above-mentioned embodiment, with LGP 302b collocation be the reflector 310a of first embodiment, but the reflector of being adopted among other above-mentioned embodiment, for example reflector 310b and change type thereof and reflector 310c all can replace the reflector 310a that is adopted among the backlight module 300d.
Fig. 3 A and Fig. 4 H are for to be carried out the Simulation result presentation graphs with three LEDs by light source.Please earlier with reference to Fig. 3 A, its distance 327 that illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness 326 of LGP is 4mm, and the opening 324a of reflector is under the situation of 4mm, the brightness distribution curve figure that is obtained.The figure 350 of Fig. 3 A is the intensity map of LGP exiting surface 336, wherein the top edge of figure 350 is incidence surface 320, the intensity of brightness curve that the intensity of brightness curve that figure 352 is obtained for the transverse axis BB ' along figure 350, figure 354 are then obtained for the longitudinal axis AA ' along figure 350.In Fig. 3 A, when the thickness of LGP is the height of the opening of 4mm and reflector when being 4mm, can find out that by figure 352 the horizontal Luminance Distribution of LGP still has and more significantly rises and falls, therefore bright spot is obvious under this kind situation.In addition, can find out LGP inner distance incidence surface distance to a certain degree by vertical Luminance Distribution of figure 354 after, brightness just can be evenly distributed, and shows that the scope of non-visible area of LGP is bigger.
Please refer to Fig. 3 B, its distance 327 that illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness 326 of LGP is 4mm, and the opening 324a of reflector is under the situation of 3.8mm, the brightness distribution curve figure that is obtained.In Fig. 3 B, when the thickness of LGP is the reduced height of the opening of 4mm and reflector when being 3.8mm, can find out that by figure 358 it is mild that the fluctuating of the horizontal Luminance Distribution of LGP has become, therefore under this kind situation, the bright spot phenomenon of non-visible area has obtained effective improvement.In addition, can find out reduction along with the opening of reflector by vertical Luminance Distribution of figure 360, the scope of the non-visible area of LGP diminishes.
Please refer to Fig. 3 C, its distance 327 that illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness 326 of LGP is 4mm, and the opening 324a of reflector is under the situation of 3.6mm, the brightness distribution curve figure that is obtained.In Fig. 3 C, when the thickness of LGP is that the reduced height of the opening of 4mm and reflector is when being 3.6mm, can find out by figure 364, the fluctuating of the horizontal Luminance Distribution of LGP is slow closing during for 3.8mm than the open height of reflector, yet under this kind situation, in LGP, can form bright line near the incidence surface part.In addition, the non-visible area scope in the time of can finding out that by vertical Luminance Distribution of figure 366 scope of the non-visible area of LGP slightly is 3.8mm than the open height of reflector is little.
Please refer to Fig. 3 D, its distance 327 that illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness 326 of LGP is 4mm, and the opening 324a of reflector is under the situation of 3mm, the brightness distribution curve figure that is obtained.In Fig. 3 D, when the thickness of LGP is the reduced height of the opening of 4mm and reflector when being 3mm, can find out by figure 370, mild when the fluctuating of the horizontal Luminance Distribution of LGP is 3.6mm than the open height of reflector.In addition, the non-visible area scope in the time of can finding out that by vertical Luminance Distribution of figure 372 scope of the non-visible area of LGP slightly is 3.6mm than the open height of reflector is little.But this moment, the non-visible area of LGP had comparatively significantly bright line phenomenon.
Please refer to Fig. 3 E, its distance 327 that illustrates between the incidence surface of the exiting surface of light emitting diode and LGP is 1mm, and the thickness 326 of LGP is 4mm, and the opening 324a of reflector is under the situation of 2.4mm, the brightness distribution curve figure that is obtained.In Fig. 3 E, when the thickness of LGP is the reduced height of the opening of 4mm and reflector when being 2.4mm, can find out by figure 376, mild when the fluctuating of the horizontal Luminance Distribution of LGP is 3mm than the open height of reflector.In addition, the non-visible area scope in the time of can finding out that by vertical Luminance Distribution of figure 378 scope of the non-visible area of LGP slightly is 3mm than the open height of reflector is little.But the bright line of the non-visible area of LGP is then more obvious at this moment.
Please refer to Fig. 4 A, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1mm, the brightness distribution curve figure that is obtained.The figure 380 of Fig. 4 A is the intensity map of LGP exiting surface 336, wherein the top edge of figure 380 is incidence surface 320, the intensity of brightness curve that the intensity of brightness curve that figure 381 is obtained for the transverse axis BB ' along figure 380, figure 382 are then obtained for the longitudinal axis AA ' along figure 380.Distance between the exiting surface of light emitting diode and the incidence surface of LGP is 1mm, and the height of the opening of reflector is 3.6mm, thereby the distance of this moment is about 27.8% to the ratio of opening.In Fig. 4 A, can find out that by figure 381 fluctuating of the horizontal Luminance Distribution of LGP is comparatively mild, therefore the bright spot phenomenon of non-visible area obtains some improvement.And can find out reduction along with the opening of reflector by vertical Luminance Distribution of figure 382, the scope of the non-visible area of LGP diminishes.
Please refer to Fig. 4 B, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.Wherein, figure 385 is vertical Luminance Distribution of LGP exiting surface 336.Distance between the exiting surface of light emitting diode and the incidence surface of LGP is 1.5mm, and the height of the opening of reflector is 3.6mm, thereby the distance of this moment increases to about 41.67% to the ratio of opening.In Fig. 4 B, can find out that by figure 384 fluctuating of the horizontal Luminance Distribution of LGP is mild when distance is 1mm, therefore the bright spot phenomenon of non-visible area obtains further to improve.
Please refer to Fig. 4 C, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 3.6mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1.08mm, the brightness distribution curve figure that is obtained.Wherein, figure 388 is vertical Luminance Distribution of LGP exiting surface 336.Distance between the exiting surface of light emitting diode and the incidence surface of LGP is 1.08mm, and the height of the opening of reflector is 3.6mm, thereby the distance of this moment increases to about 30% to the ratio of opening.In Fig. 4 C, can find out that by figure 387 fluctuating of the horizontal Luminance Distribution of LGP is mild but rise and fall greatly when distance is for 1.5mm when distance be 1mm, therefore the bright spot phenomenon of non-visible area is improved when distance is for 1mm but than obvious when being 1.5mm.
Please refer to Fig. 4 D, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 3mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1mm, the brightness distribution curve figure that is obtained.Wherein, figure 391 is vertical Luminance Distribution of LGP exiting surface 336.Distance between the exiting surface of light emitting diode and the incidence surface of LGP is 1mm, and the height of the opening of reflector is reduced to 3mm, thereby the distance of this moment increases to about 33.33% to the ratio of opening.In Fig. 4 D, can find out that by figure 390 fluctuating of the horizontal Luminance Distribution of LGP distance is all 1mm but the reflector open height is mild when being 3.6mm, therefore the bright spot phenomenon of non-visible area is improved during for 3.6mm than the reflector open height.
Please refer to Fig. 4 E, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 3mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.Wherein, figure 394 is vertical Luminance Distribution of LGP exiting surface 336.Distance between the exiting surface of light emitting diode and the incidence surface of LGP increases to 1.5mm, and the height of the opening of reflector is kept 3mm, thereby the distance of this moment increases to 50% to the ratio of opening.In Fig. 4 E, can find out that by figure 393 fluctuating of the horizontal Luminance Distribution of LGP is mild when distance is 1mm, therefore the bright spot phenomenon of non-visible area is improved when distance is for 1mm.
Please refer to Fig. 4 F, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 2.4mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1mm, the brightness distribution curve figure that is obtained.Distance between the exiting surface of light emitting diode and the incidence surface of LGP is 1mm, and the height of the opening of reflector further is reduced to 2.4mm, thereby the distance of this moment increases to about 41.67% to the ratio of opening.In Fig. 4 F, can find out that by figure 396 fluctuating of the horizontal Luminance Distribution of LGP distance is all 1mm but the reflector open height is mild when being 3mm, therefore the bright spot phenomenon of non-visible area is improved during for 3mm than the reflector open height.And the brightness that can be found out the non-visible area of LGP by vertical Luminance Distribution of figure 397 is big when being 3mm than the reflector open height, so the phenomenon of bright line is comparatively obvious.
Please refer to Fig. 4 G, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 2.4mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 1.5mm, the brightness distribution curve figure that is obtained.Wherein, figure 403 is vertical Luminance Distribution of LGP exiting surface 336.Distance between the exiting surface of light emitting diode and the incidence surface of LGP increases to 1.5mm, and the height of the opening of reflector is kept 2.4mm, thereby the distance of this moment increases to 62.5% to the ratio of opening.In Fig. 4 G, can find out that by figure 399 fluctuating of the horizontal Luminance Distribution of LGP is mild when obviously distance is 1mm, therefore the bright spot phenomenon of non-visible area is improved when distance is for 1mm.
Please refer to Fig. 4 H, its thickness 326 that illustrates when LGP is 4mm, and the opening 324a of reflector is 1.8mm, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP 327 is under the situation of 0.9mm, the brightness distribution curve figure that is obtained.The figure 404 of Fig. 4 H is the intensity map on the LGP, the intensity of brightness curve that the intensity of brightness curve that figure 405 is obtained for the transverse axis BB ' along figure 404, figure 406 are then obtained for the longitudinal axis AA ' along figure 404.Distance between the exiting surface of light emitting diode and the incidence surface of LGP shortens to 0.9mm, and the height of the opening of reflector further is reduced to 1.8mm, thereby the distance of this moment increases to about 50% to the ratio of opening.In Fig. 4 H, can find out by figure 405, be subjected to the influence that distance shortens, the big rise and fall of the horizontal Luminance Distribution of LGP.And can find out that by vertical Luminance Distribution of figure 406 though distance shortens, owing to the openings get smaller of reflector, so the scope of the non-visible area of LGP is little.
By Fig. 4 A to Fig. 4 H as can be known, the opening of reflector is more little, and the bright spot phenomenon is just slight more, and the distance between the incidence surface of the exiting surface of light emitting diode and LGP can be short more.But the opening of reflector is more little, and the bright line of the non-visible area of LGP is just obvious more.
Above-mentioned backlight module all can be applicable in the LCD, and below lifting backlight module 300a is example.Please refer to Fig. 5, it illustrates the cut-away section schematic diagram according to a kind of LCD of the preferred embodiment of the present invention.In example embodiment, LCD 400 mainly comprises display panels 402 and backlight module 300a, and wherein backlight module 300a is arranged on the back side of display panels 402, to provide display panels 402 backlights.In an embodiment, backlight module 300a more can add back of the body frame 338 and preceding frame 344 according to product demand, to support and the fixing structure of backlight module 300a.LGP 302a, LED light-source module 304 all are arranged on the back of the body frame 338 with reflector 310a, wherein carry on the back frame 338 and also optionally convex with fixedly projection 340, this fixedly projection 340 be blocked between the incidence surface 320 of the C type structure 312 of reflector 310a and LGP 302a, with fixation reflex cover 310a and be arranged at the position of the LED light-source module 304 in it, and it is other to make the opening 322a of reflector 310a remain on the incidence surface 320 of LGP 302a.Preceding 344 of frames are located on the outer rim and LED light-source module 304 and reflector 310a of LGP 302a, and a side of preceding frame 344 is extended the lateral surface that is located at reflector 310a and back of the body frame 338.Optionally, back of the body frame 338 has more trip 342, and preceding frame 344 is provided with fixing hole 346 corresponding to the position correspondence of trip 342 of back of the body frame 338, and the trip 342 of wherein carrying on the back frame 338 can be arranged in pairs or groups mutually with the fixing hole 346 of preceding frame 344 and is fastened togather.Display panels 402 can set up on the former frame 344, and is carried by preceding frame 344.
By above-mentioned example embodiment as can be known, advantage of the present invention is exactly because backlight module of the present invention can limit the rising angle of two directions up and down of light emitting diode, the angle that the light of controlling light emitting diode thus and being sent enters LGP, and the central authorities that make the more past visible area of light penetrate from the exiting surface of LGP after advancing again, therefore can effectively alleviate even eliminate the bright spot ripple of the light inlet of LGP.
By above-mentioned example embodiment as can be known, another advantage of the present invention is exactly because the bright spot phenomenon of backlight module of the present invention can obtain significantly to improve or eliminate, therefore can increase the spacing of the light emitting diode of LED light-source module, and can reduce the usage quantity of light emitting diode, and can reduce the edge frontal region of backlight module.
By above-mentioned example embodiment as can be known, another advantage of the present invention is exactly because LCD of the present invention can taken into account under the dimensions of display, effectively reduction or essence are eliminated the bright spot ripple of backlight module, therefore can under original dimensions, effectively promote the display quality of LCD.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those of ordinary skill in this technical field; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention defines and is as the criterion when looking appended claim.
Claims (12)
1. backlight module comprises at least:
LGP has incidence surface;
LED light-source module is located at by this incidence surface; And
Reflector has opening and is adjacent to this incidence surface, wherein this LED light-source module be arranged in this reflector and via this opening towards this incidence surface incident light, the height of this opening is less than the thickness of this LGP.
2. backlight module as claimed in claim 1, wherein this height of this opening between the essence 3/4 of this thickness of this LGP between the essence 19/20.
3. backlight module as claimed in claim 1, wherein this LGP is the wedge type plate structure.
4. backlight module as claimed in claim 1, wherein this LGP comprises at least:
Non-lead angle district; And
The lead angle district, wherein this incidence surface is located on the side in this lead angle district and this lead angle district is adjacent to this LED source and this reflector.
5. backlight module comprises at least:
LGP has incidence surface;
LED light-source module is located at by this incidence surface, and wherein this LED light-source module comprises a plurality of light emitting diodes at least, and each described light emitting diode has exiting surface, and has distance between this exiting surface and this incidence surface; And
Reflector has opening and is adjacent to this incidence surface, wherein this LED light-source module be arranged in this reflector and via this opening towards this incidence surface incident light, the ratio of this distance and the height of this opening is more than or equal to 30%.
6. backlight module as claimed in claim 5, wherein this height of this opening between the essence 3/4 of this thickness of this LGP between the essence 19/20.
7. backlight module as claimed in claim 5, wherein this LGP is the wedge type plate structure.
8. backlight module as claimed in claim 5, wherein this LGP comprises at least:
Non-lead angle district; And
The lead angle district, wherein this incidence surface is located on the side in this lead angle district and this lead angle district is adjacent to this LED source and this reflector.
9. LCD comprises at least:
Display panels; And
Backlight module is located at the back side of this display panels, and wherein this backlight module comprises at least:
LGP has incidence surface;
LED light-source module is located at by this incidence surface; And
Reflector has opening and is adjacent to this incidence surface, wherein this LED light-source module be arranged in this reflector and via this opening towards this incidence surface incident light, the height of this opening is less than the thickness of this LGP.
10. LCD as claimed in claim 9, wherein this height of this opening between the essence 3/4 of this thickness of this LGP between the essence 19/20.
11. a LCD comprises at least:
Display panels; And
Backlight module is located at the back side of this display panels, and wherein this backlight module comprises at least:
LGP has incidence surface;
LED light-source module is located at by this incidence surface, and wherein this LED light-source module comprises a plurality of light emitting diodes at least, and each described light emitting diode has exiting surface, and has distance between this exiting surface and this incidence surface; And
Reflector has opening and is adjacent to this incidence surface, wherein this LED light-source module be arranged in this reflector and via this opening towards this incidence surface incident light, the ratio of this distance and the height of this opening is more than or equal to 30%.
12. LCD as claimed in claim 11, wherein this height of this opening between the essence 3/4 of this thickness of this LGP between the essence 19/20.
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|---|---|---|---|
| CN200910253165.9A CN102086992B (en) | 2009-12-04 | 2009-12-04 | Backlight module and application thereof |
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|---|---|---|---|
| CN200910253165.9A CN102086992B (en) | 2009-12-04 | 2009-12-04 | Backlight module and application thereof |
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| CN102086992A true CN102086992A (en) | 2011-06-08 |
| CN102086992B CN102086992B (en) | 2015-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954409A (en) * | 2011-08-24 | 2013-03-06 | 三星电子株式会社 | Backlight assembly and method for manufacturing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001126523A (en) * | 1999-10-26 | 2001-05-11 | Advanced Display Inc | Sheet light source device and liquid crystal display using it |
| CN1321345C (en) * | 2003-08-06 | 2007-06-13 | 友达光电股份有限公司 | Sidelight back light module |
| CN101308286A (en) * | 2008-07-09 | 2008-11-19 | 友达光电股份有限公司 | Backlight module group and reflective cover manufacture method and mould for manufacturing thermoplastic reflective cover |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954409A (en) * | 2011-08-24 | 2013-03-06 | 三星电子株式会社 | Backlight assembly and method for manufacturing same |
| US9291854B2 (en) | 2011-08-24 | 2016-03-22 | Samsung Display Co., Ltd. | Backlight assembly and display apparatus having the same |
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| CN102086992B (en) | 2015-06-03 |
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